Central Metallurgical Research and Development Institute

About: Central Metallurgical Research and Development Institute is a government organization based out in . It is known for research contribution in the topics: Chemistry & Nanoparticle. The organization has 6 authors who have published 19 publications receiving 150 citations.

Cobalt ferrite-modified sol-gel synthesized ZnO nanoplatelets for fast and bearable visible light remediation of ciprofloxacin in water

Abstract: Currently, metal oxide photocatalysts is a green and facile tool for the elimination of emerging pollutants utilizing light illumination. Though, the wide bandgap energy (Eg), rapid recombination of photogenerated carriers, and photostability of these oxides represent critical issues before the actual application. Herein, we familiarise a sol-gel based synthesis of ZnO hexagonal nanoplatelets modified with CoFe2O4 (CFO) nanoparticles at minor loading (1.0-4.0 wt %) to yield CFO/ZnO nanoheterojunctions. The CFO/ZnO unveiled mesostructured surfaces at surface areas of 102-120 m2 g-1 and photoactive in the visible region with high. The CFO addition to ZnO reduced its Eg from 3.14 to 2.66 eV. The formed nanoheterojunctions were applied to remediate ciprofloxacin (CPF), as an antibiotic pollutant in wastewater. The 2.4 g L-1 3.0 wt % CFO-added ZnO exhibited a 100% removal of 10-ppm CPF within 45 min of visible-light irradiation and sustainable recycling ability for five consecutive runs at 97%. The sustainable performance of CFO/ZnO is ascribed to the suppression of photogenerated carriers and reduction of E by p-n nanoheterojunction formation. This study broadens the way for nanoheterojunction oxides for the destruction of pharmaceutical wastes under visible-light illumination.

High-performance electrode materials for supercapacitor applications using Ni-catalyzed carbon nanostructures derived from biomass waste materials

Abstract: • Ni/carbon nanostructure materials have been synthesized from biomass waste using simple approach. • Synthesis of carbon nanotubes or amorphous carbon nanostructures can be controlled by adjusting the temperature process. • NiO/ porous amorphous carbon nanostructure (PACNS) material delivered specific capacitance of 508 F g −1 at 1 A g −1 . • The NiO/PACNS electrode shows a capacitance retention rate of 78% at 5 A g −1 after 3000 cycles. Herein, nanostructured nickel metal, oxide, and oxyhydroxides have been successfully grown on various types of carbon nanostructures (CNS) via a simple, low cost and eco-friendly route derived from biomass waste materials. Nickel oxide and oxyhydroxide phases could be detected in the roasted precursor materials before pyrolysis as confirmed by X-ray diffraction (XRD) analysis. Transmission electron microscopy (TEM) images showed that these samples were composed mainly of porous amorphous carbon nanostructures. Whereas nickel-metal and nickel oxyhydroxide were the predominant detected phases after pyrolysis in addition to the graphite and carbon phases in the form of carbon nanotubes as confirmed by XRD analysis and TEM investigation, respectively. These composites were explored as potential electrodes for supercapacitor application delivering satisfactory specific capacitance values beside its remarkable charge/discharge reversibility. Among them, the formed porous amorphous carbon nanostructure sample decorated with NiO species displayed the highest capacitive performance. This sample delivered a specific capacitance of 508 F g −1 at 1 A g −1 . Moreover, the cycling stability behavior of this sample at 5 A g −1 delivered 78% of its initial capacity after 3000 GCD cycles. The obtained results suggested that the prepared materials are a promising candidate as electrode material for energy storage applications.

Templated synthesis of CuCo2O4-modified g-C3N4 heterojunctions for enhanced photoreduction of Hg2+ under visible light

Abstract: Background The accumulation of mercury (II) ions (Hg2+) in wastewater causes critical impacts on human health and the whole environment. Methods This study report an efficient synthesis of CuCo2O4/g-C3N4 p-n heterojunction by templated growth via triblock copolymer F-127 and mesoporous silica MCM-41 for enhanced photoreduction of Hg2+. Significant Findings The 22.6 nm CuCo2O4 nanoparticles were anchored on g-C3N4 at minor content (0.5−2.0 wt. %) as observed by TEM analysis. The formed heterojunctions exhibited mesoporous surface textures with high specific surface areas. In addition, the visible-light harvesting of g-C3N4 was improved by adding CuCo2O4 due to the reduction of the bandgap energy from 2.77 to 2.17 eV. The complete visible-light photocatalytic reduction of Hg2+ utilizing 1.5 wt.% CuCo2O4-modified g-C3N4 was realized with a tremendous rate of 286.5 µmol min−1 after dose tuning at 1.5 gL−1. The enhanced catalytic presentation of this innovative CuCo2O4/g-C3N4 is denoted to the significant separation of photoinduced carriers through the p-n heterojunction's interface. The bearable photocatalytic reduction of Hg2+ for five cycles was also established for the regenerated photocatalyst.